Dennis,
For a "quick-and-dirty" cleanup, I've sprayed fouled plugs with either
brake cleaner or carburetor cleaner, then blew them out with compressed
air before it dries.  This usually gets them sparking again.  It is
amazing how much black gunk gets flushed out.  

Mark S.

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Dennis Haverlah
Sent: Monday, November 13, 2006 8:55 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Cleaning spark plugs

I have been running my RX -8 at low power settings while finishing up
the engine install details.  Recently it ran very rough and changing the

plugs fixed the problem.  The plugs that produced the rough running
engine are the RE7A L and RE9BT iridium plugs that are standard with the

Renessis car.  These plugs have a thin layer of  slightly moist carbon
on the porcelain.  Any suggestions for cleaning?  Can I use a standard
air operated blaster like is used on A/C plugs?  I believe these plugs
cost around $35!  Should I be using the different plugs for the Renessis

in the A/C?

Ed - Thanks for the engine data from your last flight - I plan on
running some full power static tests on my A/C later this week.

Dennis H.

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